/Engine/Plugins/Runtime/CommonUI/Source/CommonUI/Public/CommonLazyImage.h
Set the brush from a lazy material asset pointer - will load the material as needed.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category=LazyImage) void SetBrushFromLazyMaterial ( const [TSoftObjectPtr](API\Runtime\CoreUObject\UObject\TSoftObjectPtr)< [UMaterialInterface](API\Runtime\Engine\Materials\UMaterialInterface) > & LazyMaterial )